They closed their ETH address that's why you see those errors after reaching their initial target. you can see it on the first page of this ann thread.
Official Announcement [updated on 26 Aug 2017, 17:00 GMT 8+]
Dear all XPlay Supporters:
We already stopped accepting ETH in smart contract address from 8:00pm GMT+8 / 12:00pm UTC today (26 August).
We will wait for our ICO platform partner to finish up the ICO process.
We will keep you posted for any updates!
Thanks for your support!!
XPlay Team
https://xplay.fund/ico
You can join on the telegram to ask the developer about the problem or wait for the updates here.